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It depends on many factors. In urbanised areas, the surface run off is increased due to more impermeable materials (tarmac as opposed to a field). These impermeable surfaces don't allow as much (sometimes any) percolation, infiltration etc to happen. This means that the water travels faster by surface run off, therefore increasing the volume of water in the river. Areas of high density rain often make the river exceed the carrying capacity, and if sediment etc is washed in, the competence can be exceeded as well which can cause a flood. More water on a surface leads to more water into rivers. Take Boscastle in Southern England. I live near to Boscastle and in 2004 it flooded very badly due to the geology of the area (the rock type was highly impermeable), the urbanisation of the area, the fact that there is a confluence of 3 rivers there. There was also a large about of localised rainfall in the area in the weeks before saturating the ground. Its usually due to urbanisation and geology. There's many reasons, often a combination of them. I do A-level Geography in Dorset, further studying it at university. It's rarely just one thing.
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What are Flash floods?
It can be caused by a single cloudburst of torrential rain, usually at higher ground. Collected rainwater runs downhill quickly overflowing rivers and streams.
What are rain-fed rivers?
When rain falls on the land it drains to the lowest points on the landscape
Why is the rivers source in the highlands?
The rivers source is in the highland because that is where the rain falls and gets collected. love addie carter
Fresh water enters the ocean by?
Rivers and rain are the two that I can think of.
Do most rain and snow comes from evaporation of lakes and rivers?
false
Which rivers cause floods?
Well, mostly rivers where there is a lot of rain. All rivers could flood with enough rain.
What is the longest river in Malta?
There are no permanent rivers in Malta due to selective rainfall, meaning that the rivers dry out very quickly, only then leaving a ditch where the river was. Rain then falls and fills these ditches, creating rivers that only last for so long.
What are Flash floods?
It can be caused by a single cloudburst of torrential rain, usually at higher ground. Collected rainwater runs downhill quickly overflowing rivers and streams.
Why the rivers of south India are less suitable for irrigation than the rivers of north India?
the north indian rivers are perinnial as they are snow fed but the south indian rivers are seasonal as they are rain fed. Since they are rain fed there is no garranty of rain . So the south indian rivers are less suitable for irrigation than the rivers of north India.
Where do your rivers take their source?
in the rain
Do rivers precipitate?
No, because rivers aren't condensed clouds or rain.... ಠ_ಠ
What causes sudden rain?
water evaporating quickly from earth's surface and condensing quickly forming rain droplets.
How does the Tigris and Euphrates rivers get their water?
It falls as rain/snow in the watershed of the two rivers.
What is the adverb in this sentence I ran quickly through the rain?
quickly
What are some effects of acid rain?
Acid rain destroy's forest damages property and harms wildlife. Lakes and rivers are effected by acid rain because when the acid rain falls in to the lakes and rivers it turns into polluted water.
What makes the rain?
when the sun heat the rivers, it evaporate, and so the evaporation becomes rain.
What are rain-fed rivers?
When rain falls on the land it drains to the lowest points on the landscape
